Question

_____on the MSN, some people often use ‘88’ for ‘good-bye’.

A．When chat

B．When chatted

C．When chatting

D．When to chat

Answer 1

C

现在分词做状语。现在分词的动作与主语为主谓关系,做时间状语时可在分词前加when。“人们网上上聊天时经常用88表示再见”选C。